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TD ALL WHOM IT MAY CONCERN:

Be it known that I, NICHOLAS NOLAN, of the city, county, and State of New York, have invented a new and improved Propeller; and that the following description', taken in connection with the accompanying drawings, hereinafter referred to, forms a full and exact specification of the same, wherein I have set -forth the nature and principles of my said improvements, by which my invention may be distinguished from all others of a similar class, together with such parts as I claim, and desire to have secured to me by Letters Patent.

This invention relates to a new and improved-propeller for propelling vessels of all kinds, and it consists in a novel manner o? operating and feathering oscillating blades or paddles, as hereinafter shown and described,

whereby a very eieicnt propeller is obtained, and one which may be operated by a very moderate power. In

the accompanying sheet of drawings Figure 1 is a side sectional view oi' -my invention.v

Figure 2, a plan or top view ofthe same.

Figure 3, a transverse section of the same, taken in the line x x, iig. 2.

Similar letters of reference indicate like parts. v i

A represents a boat or vessel, to which my invention is applied, and B is a rock-frame, which is fitted in bearings a on the vessel, the rock-frame boing allowed to work freely in the bearings, and extending entirely across the beater vessel, projecting beyond'thesides thereof, and having the cylindrical shank C of a blade or paddle, D, iitted in each end. These blades or paddles are allowed to turn freely in the frame B, and their shanks C have each a hub, b, on them, provided with projections g, which are connected bya bar, E. In the rock-frame B, at a point near its centre, there is fitted, at right angles, a. shaft, F, having abevel-wheel, G, upon it, into which a bevel-segment, H, gears, and this segment is connected, by a hub or bar, d, with a circular plete, c, the axis or shaft f of which has its bearing in an upright, g, on the rock-frame. In the plate e andl segment H there are dttedtwo pins, h h, and these pins extend entirely across the space between the p'late e and segment H. The bevel-wheel G on the shaft F has an arm, z', projecting from it, provided with a pendentpin, j, which is fitted in an arm, k, on the bar E, and the upper end of shaft F is connected, by a rod, I with a crank-wheel, J, on the driving-shaft K, the latter being provided with a crank, L, which has a rod, M, connected to it, the latter working in the space betweenl the circnlar plate e and the bevel-segment H, and resting upon the pins 7i 7i.. The rod M has a hook, iX, at its outer end, and a shoulder, j, upon it at some distance fron'rits outer end, as shown in fig. 1. l

l From the above description it will be seen that, as the driving-shaft K is rotated, a rock motion will be given the frame B' b y the crank-wheel J and rod I, and the blades or'paddles D thereby operated with an oscilloting or vibrating motion, and at the termination of each stroke they are feathered, or turned so :is to presentl their broad surfaces to the water as they are moved or drawn hack to propel the vessell forward, and present a narrow edge to the water, as they are moved forward, thenarrow edges moving through the water with but very little resistance. The blades are feathered by the rod M acting against the pins t h', the hook iX catching over the pin z when the blades D reach the termination of their working-stroke, and turning the segment 'I-I, and thereby the shaft F, so that the blades D will be presented edgewise to the water, and, as the blades reach the termination of their forward movement, the shoulder j of the rod M will strike the pin h and turn the blades, so that their broadsidcs will be presented to the water as they move to propel the boat forward. This fcathering operation is very quickly performed at the termination of each stroke, occasioning no loss of' power. I

The invention is applicable in all cases where a propeller may be used, und may be employed in aerial navagation, if that ever be successfully attained.

Having thus described my invention, I claim as new, and desire-to secure by Letters Patent- The blades or paddles D D, fitted in the rock-frame B, and operated from the driving-sbai`t K, through the medium of the crank-wheel J and connecting-rod I, or their equivalents, in combination with the rod M attached lto the crankL on the driving-shaft, and provided with the hook 71X, and shoulder j, to catch over pins h t, the

bevel-segment H and the bevel-wheel Gr on shaft F, connected with the bar E, all being arranged to operate in the manner substantially as and for the purpose set forth.

The above specification of my invention, signed by me, this 9th day of May, 1867.

' NICHQLAS NOLAN.

Witnesses Wn. F. MeNAMARA, J. A. SERVICE. 

